In reply to lee birtwistle: Internal hubs are like running single speed, some kind of chain tensioning is required. I tried sring based chain tensioners, but I wouldn't bother, you're best with a frame that has horizontal dropout, or the diagonal ones some internal hub frames have. The dropouts on your 27 gears frame won't allow adjustments, as far as I am aware.
For belt drives, a special frame is required, as the belt can't be split, like a chain can for installation. They have a removable piece of frame to leave a gap the belt can go through.
Post edited at 13:53